I donated blood at the beginning of last year, and now the blood station says I am Rh-negative type A blood. Do they make mistakes?

1. Generally, only ABO blood group system is tested when donating blood. RH blood group is generally not tested, because the testing cost is high and the probability is relatively small.

2.Rh-negative blood group is rare blood group, so relatively speaking, there are fewer patients with Rh-negative blood group who need blood transfusion urgently;

3. The shelf life of ordinary whole blood is only 30-35 days. For rare blood group, blood stations are generally preserved by red blood cell freezing, and the preservation period can be as long as several years until it is thawed when necessary;

4. In a bloody battle, you will not take the initiative to contact blood donors to inform them of their specific blood types. The blood station contacted you voluntarily. It may be that emergency patients are in urgent need of blood, and the blood station has no stock. Or the blood station will organize a rare blood group party and invite you to attend;

Every blood donor will have a unique number every time he donates blood. The serial numbers of blood bags, test tubes and blood donation registration forms are all the same, and there will be no mistakes.